Anne Hathaway is taking her role as Catwoman in the upcoming Batman installment very seriously -- and is committed to an intense workout schedule in the hopes that she might be the most unforgettable Catwoman yet.

"Anne is working out five days a week. She's taking it very seriously and wants her body in tip-top condition," a source told The Daily Mirror.

"Secretly she hopes to upstage Halle Berry, who last played Catwoman. She's doing dance classes, weight-training and cardio - she wants to be the sexiest Catwoman ever."

Hathaway is currently in Pittsburg filming the much-anticipated "The Dark Knight Rises", which stars Christian Bale in the lead role. Previous Catwomen have been played by Halle Berry and Michelle Pfeiffer.

The Daily Mirror snapped photos of Anna Hathaway this week. The 28-year old actress had slipped out of her catsuit and into a flowing white dress, presumably to film scenes as Catwoman's alter-ego, Selina Kyle.

Do you think Hathaway will out-claw Halle Berry and Michelle Pfeiffer?

Anne Hathaways transformation
Anne Hathaway poses at the world premiere of her and co-star Jake Gyllenhaal's film 'Love & Other Drugs' at the opening night gala at AFI Fest 2010 in Hollywood , California November 4, 2010. Reuters
Anne Hathaway Costume Ball
Anne Hathaway arrives at the Metropolitan Museum of Art Costume Institute Benefit celebrating the opening of "American Woman: Fashioning a National Identity" in New York May 3, 2010. Reuters
Anne Hathaway
Co-hosts James Franco (L) and Anne Hathaway stand on stage during the 83rd Academy Awards in Hollywood, California, February 27, 2011. Reuters
Halle Berry
The court sided and favored Halle Berry when it comes to her daughter. Reuters
Halle Berry
Halle Berry had a craving for hot and salty food during her pregnancy. Her favourite was Peperoncinis, an Italian pepper with mild heat. Commonly pickled and used in salads, sandwiches, antipasto, and as a garnish, pepperoncinis straight from the jar were Halle's favorites. She even drank the salty juice! Reuters
Pfeiffer
Michelle Pfeiffer and Harrison Ford stars of the thriller film " What Lies Beneath" pose together at the film's premiere in Los Angeles July 18. Pfeiffer played Catwoman in "Batman Returns." Reuters
Michelle Pfeiffer Michelle Pfeiffer Michelle Pfeiffer